| The municipal pipeline is one of the critical infrastructure in the modern city,which bears the energy supply and transmit, the information exchange, that is integrate with material flow and information flow in the city. With the development of society and the advancement of current urbanization level in our country, the integrated pipe network of municipal develops rapidly, the pipe network system is also growing, and the degree of complexity is increasing year by year; However, Urban underground is space of limited resources, how efficient to use of urban underground space, as well as a more rational layout of the integrated pipeline system of municipal is in need of solving urgently right now. What's more, The underground pipeline which the integrated pipeline system of municipal involved not only a great variety, but also a large quantity in a city, How to use these pipeline and pipe point information to establish spatial database or attribute database, and carries out associated management, namely achieve to digitization of pipeline system, which is also the focus of recent studiesThere are a number of restrictive factors that impact of municipal pipeline system planning-layout, such as pipe shape, size, diameter, pipe material, pipe flow and so on. In this paper, Combined with urban pipeline alignment and planning-layout principles, analyses to the basic factors that impact of municipal pipeline system integrated layout, probes into the description methods that municipal pipeline system optimize and laying; From four aspects about the minimum cost flow of pipe network laying, the maximum flow of pipe network laying, the shortcut of pipe network laying and the smallest profile area with mutual nonintervention of multiple pipeline in the pipe network layout space, we establish a multi-objective layout model based on the pipeline layout system .For how to achieve the digitization of municipal pipeline system, the article through the data organization and data conversion to design the data structure of pipeline and pipe point file, as well as the Vectorization of spatial data; and connect Access database with MAPGIS attribute database, the digitization of management system is come true. In addition, we analyses the space of pipeline system based on MAPGIS software: thereinto, we can draw ground isoline and display the integrated pipeline in road cross-sectional profile through the analysis of TIN digital elevation model; we can alse inquire about the path of municipal pipeline, make tracks for the reticle and attributes statistic and other functions through the analysis of pipeline network.Combined with the engineering example of road integrated pipeline in one city, the study shows: Digitization research of municipal pipeline system has something operability and practicability to do, It's important and convenient for the day-to-day management and information sharing through a variety of pipeline network inquiries, tracking, attribute statistics, as well as the profile display of the integrated pipeline in the road. |
